pH and thermal stability studies of carboxymethyl cellulase from intergeneric fusants of Trichoderma reesei Saccharomyces cerevisiae

The combined effect of pH and temperature on carboxymethyl cellulase from two intergeneric fusants (M 14 and M 62) of Trichoderma reesei QM 9414/Saccharomyces cerevisiae NCIM 3288 was studied using response surface methodology. A central composite design for two variables was employed for the optimization studies. This study was compared with similar studies carried out with Trichoderma reesei QM 9414. The optimal pH and temperature for the enzymes derived from these organisms were: for the fusant M 14-pH 5.7 and 41.7 degrees C, for the fusant M 62-pH 5.3 and 43 degrees C, and for Trichoderma reesei QM 9414-pH 4.31 and 38.3 degrees C.